Typically these are the kinds of cards I avoid putting in the cube but at just five mana rather than the six plus you tend to find most stand alone gold legendary threats occupying Obzedat has seen a fairly decent amount of play, and not just in two colour decks I should add
Oblivion Ring: The theoretical upside here is that it can hit Detention Sphere, but against people with Detention Sphere, Detention Sphere has the upside that it cant be hit by their Spheres
Verrak, Warped Sengir Verrak, Warped Sengir seems incredibly busted but I never see anybody play it
Often these triggered abilities are effects so minor we might not want to spend an entire card on them, but they can be quite valuable as part of the package deal
So, it isnt counted as part of the card as you can get some printings without the reminder text
The Earthen Ally is a humble 0/2 for one Green mana, gaining power for each color among Allies you control